- Deleted `CHANGES.md`, `CHANGES_SUMMARY.md`, `CONCURRENCY_ANALYSIS.md`, `CONCURRENCY_IMPLEMENTATION_SUMMARY.md`, and related developer documentation files.
- Removed redundant or legacy content no longer aligned with the current codebase and workflows.
- Updated repository to reflect streamlined documentation approach, reducing clutter and improving maintainability.
**Purpose**: Simplify and declutter repository by removing obsolete documentation files, ensuring it remains focused and relevant.
- Introduced `CONCURRENCY_ANALYSIS.md` to outline identified concurrency issues, including statistics handling, index synchronization, and storage contention.
- Added `CONCURRENCY_IMPLEMENTATION_SUMMARY.md` to summarize concurrency improvements, such as distributed locking and change log mechanisms.
- Created `STORAGE_CONCURRENCY_ANALYSIS.md` to evaluate concurrency risks and applied solutions for different storage adapters (`S3CompatibleStorage`, `FileSystemStorage`, `OPFSStorage`, and `MemoryStorage`).
- Updated codebase with changes related to concurrency, including distributed locking, atomic updates, event-driven synchronization, and change log support.
- Refactored tests to verify behavior of new concurrency mechanisms, including robust error handling and cleanup functions.
**Purpose**: Provides comprehensive documentation and implementation details to ensure robust concurrency handling in multi-instance, high-throughput environments.
